Drybrows are made of a super absorbent polymer and permeable paper which ensures that it soaks up sweat and holds moisture. The build up of sweat, bacteria and grime can lead to irritation, spots and a musty smell building up in your hat. You can prevent this by using Drybrow hat liners. Prolong the life of your riding hat, minimise irritation and odours and enjoy working hard in your riding whilst Drybrow works just as hard at wicking away the results of your hard work! Super Lightweight. Very discreet. Available in packs of 10.